/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.spi.swapspace;

import org.jetbrains.annotations.Nullable;

/**
 * Swap space SPI eviction listener.
 */
public interface SwapSpaceSpiListener {
    /**
     * Notification for swap space events.
     *
     * @param evtType Event type. See {@link org.apache.ignite.events.SwapSpaceEvent}
     * @param spaceName Space name for this event or {@code null} for default space.
     * @param keyBytes Key bytes of affected entry. Not {@code null} only for evict notifications.
     * @param valBytes Value bytes of affected entry. Not {@code null} only for evict notifications.
     */
    public void onSwapEvent(int evtType, @Nullable String spaceName, @Nullable byte[] keyBytes, @Nullable byte[] valBytes);
}